When did the Subaru Impreza switch to timing chain?
The Subaru Impreza has been a popular choice among car enthusiasts for its reliability, performance, and innovative engineering. One of the key components in any engine is the timing system, which ensures the proper synchronization of the engine's valves and pistons. Over the years, Subaru has made significant changes to the Impreza's timing system, transitioning from timing belts to timing chains in certain models. This article explores when and why this change occurred.
Understanding Timing Belts vs. Timing Chains
Before diving into the specifics of the Subaru Impreza, it’s important to understand the difference between timing belts and timing chains:
- Timing Belts: Made of rubber and reinforced with materials like fiberglass, timing belts are lightweight and quiet but require regular replacement, typically every 60,000 to 100,000 miles.
- Timing Chains: Made of metal, timing chains are more durable and often last the lifetime of the engine. However, they can be noisier and slightly heavier than belts.
Subaru’s decision to switch from timing belts to timing chains in some of its engines reflects a broader industry trend toward reducing maintenance costs and improving engine longevity.
When Did the Subaru Impreza Transition to a Timing Chain?
The Subaru Impreza began using timing chains with the introduction of the FB engine series in 2011. Specifically, the 2012 Subaru Impreza, which featured the new FB20 engine, marked the transition from a timing belt to a timing chain. This change applied to the naturally aspirated (non-turbocharged) models of the Impreza.
Prior to this, older Impreza models equipped with the EJ engine series relied on timing belts. The EJ engines were known for their performance and reliability but required periodic timing belt replacements as part of regular maintenance.
Why Did Subaru Make the Switch?
Subaru’s decision to adopt timing chains in the FB engine series was driven by several factors:
- Reduced Maintenance Costs: Timing chains are designed to last the lifetime of the engine, eliminating the need for costly timing belt replacements.
- Improved Engine Efficiency: The FB engine series introduced other advancements, such as improved fuel efficiency and reduced emissions, aligning with Subaru’s commitment to sustainability.
- Enhanced Durability: Timing chains are more robust and better suited for modern engines that operate under higher stress and temperatures.
What Does This Mean for Subaru Impreza Owners?
If you own a Subaru Impreza manufactured from 2012 onward with the FB engine, you can enjoy the benefits of a timing chain, including lower long-term maintenance costs. However, it’s still important to follow your vehicle’s recommended maintenance schedule to ensure the timing chain and other engine components remain in good condition.
For owners of older Impreza models with EJ engines, regular timing belt replacement is essential to avoid potential engine damage. Be sure to consult your owner’s manual or a trusted mechanic for guidance on timing belt replacement intervals.
Conclusion
The switch from timing belts to timing chains in the Subaru Impreza represents a significant step forward in engine design and reliability. By adopting timing chains in the FB engine series starting in 2011, Subaru has reduced maintenance requirements and enhanced the overall ownership experience for Impreza drivers. Whether you own an older model or a newer one, understanding your vehicle’s timing system is key to keeping it running smoothly for years to come.
Frequently Asked Questions
Does the 2017 Impreza have a timing belt or chain?
They don't have a timing belt. There is a chain and the seals don't last as long as the chain so it is not a maintenance item anymore.
What year did Subaru go to timing chain?
Simply, then, a 1997 to 2011 Forester will have a timing belt, while any of the fourth-gen Foresters (from 2013 or later) will have a timing chain. And for a brief period from 2011 to 2012, the Forester was fitted with either a timing belt or a timing chain depending on which engine was fitted.
Does a 2018 Subaru Impreza have a timing belt or chain?
The GEN5 Impreza has only a single belt. It drives the alternator and AC compressor. There is no timing-belt and instead has timing CHAIN which should last well over 150K miles if oil is changed regularly.
Does a 2008 Subaru Impreza have a timing belt or chain?
This Fits Your 2008 Subaru Impreza. Your timing belt is typically replaced as part of a scheduled service. A failed timing belt can result in anything to an engine that will crank but not start to catastrophic engine damage.
What years did Subaru have CVT problems?
The models and years that were affected mainly by transmission issues are:
- Crosstrek, 2013 – 2015.
- Crosstrek Hybrid, 2014 – 2015.
- Forester (2.0 and 2.5 liter engines), 2014 – 2015.
- Impreza, 2012 – 2015.
- Legacy, 2010 – 2015.
- Legacy 3.6L V6, 2015.
- Outback, 2010 – 2015.
- Outback 3.6L V6, 2015.
Does a 2015 Subaru Impreza have a timing belt?
Newer models use timing belts made of polyurethane and Kevlar for long life and durability. They can go as long as 100,000 miles although it's always a good idea to change it before then. Belt failure can cause extensive damage to the valves, pistons and other internal parts of the engine.
What year did Subaru stop using timing belts?
2011 was the first year for the newest version of the 2.5L normally aspirated engine. Years previous to 2011 the 2.5L, as did all Subaru flat four engines, used a timing belt. Beginning in 2011 the 2.5L uses a timing chain.
Does a 2009 Subaru Impreza have a timing belt?
For example, the 2009 Subaru Impreza owner's manual recommends timing system inspections every 30,000 miles and having the timing belt replaced every 105,000 miles. Failure to change the timing belt on time could lead to a timing system failure.
What Subaru models have a timing chain?
All Foresters from 2011 onward (2014 for the XT) have a timing chain.
Does a 2015 Subaru have a timing chain?
This Fits Your 2015 Subaru Impreza. Your engine's timing chain can stretch over time resulting in a check engine light that comes along with excessive noise from your engine's timing cover. If the chain has broken, which is a rare occurrence, the engine will not start.
